Airbus A340 is a four engine, wide body long haul aircraft. There are 4 different variants: A340-200 (59.39m long / 239-375 passengers), A340-300 (63.60 long / 295-375 passengers), A340-500 (67.90m long / 313-375 passengers) and A340-600 (75.3m long / 380-440 passengers). A340-600 is the longest passenger aircraft in the world.